Lung irritation from pollution describes respiratory discomfort, airway sensitivity, coughing tendency, throat dryness, chest tightness, mucus response, reduced breathing comfort, and increased airway reactivity associated with exposure to polluted air. Pollution can include particulate matter, smoke, vehicle exhaust, industrial emissions, wildfire smoke, chemical fumes, volatile organic compounds, indoor combustion byproducts, pesticide residues, mold toxins, and fine airborne particles. These exposures can contact the airway lining directly and increase oxidative stress, epithelial irritation, inflammatory signaling, mucus changes, and immune activation in the respiratory tract. The lungs have a large surface area designed for gas exchange, so inhaled irritants can interact with airway epithelial cells, alveolar macrophages, antioxidant enzymes, mucus, cilia, and vascular tissue. When antioxidant reserves are low, hydration is poor, fiber intake is low, or the diet is dominated by oils, fried foods, refined sugar, meat, dairy, and ultra-processed foods, the body may have less nutritional support for redox balance, barrier repair, detoxification, and controlled inflammatory signaling. P53 Nutrition support for lung irritation from pollution is built on a no-oil, no-meat, no-dairy, no-toxin, 100% whole-food plant-based pattern. The goal is to support the biological systems that help the lungs handle irritant exposure: antioxidant defense, Nrf2 signaling, glutathione defense, epithelial barrier integrity, immune response signaling, hydration, mucus balance, detoxification pathways, and gut microbiome signaling. Vitamin C-rich foods such as guava, kiwi, orange, lemon, grapefruit, strawberries, black currant, red bell pepper, broccoli, kale, parsley, and watercress help support antioxidant status and collagen-related barrier structure. Carotenoid-rich foods such as sweet potato, carrot, pumpkin, butternut squash, tomato, kale, spinach, collard greens, mustard greens, and red bell pepper support epithelial tissue biology and antioxidant networks. Cruciferous vegetables such as broccoli, Brussels sprouts, cabbage, cauliflower, kale, watercress, mustard greens, and arugula provide glucosinolates and isothiocyanate-related compounds that are studied for Nrf2 and detoxification pathway support. Berries, pomegranate, citrus, apples, green tea, herbs, spices, garlic, onion, turmeric, ginger, oregano, thyme, rosemary, basil, and parsley provide polyphenols, flavonoids, catechins, allium sulfur compounds, and phenolic acids. Legumes, whole grains, mushrooms, nuts, and seeds provide fiber, plant protein, minerals, amino acids, and microbiome-supporting carbohydrates. A high-diversity plant pattern supports the lungs indirectly through antioxidant capacity, metabolic balance, vascular function, gut-derived immune signaling, and toxin reduction.